Among Rappler's senior editors and founders, Chay was former managing editor and now heads Rappler’s Investigative Desk – Newsbreak – and is in charge of training. Before joining Rappler, she was a contributing writer of Newsbreak Magazine and was one of its founding editors, too, in 2001. Chay co-wrote with Miriam Grace Go "Ambition, Destiny, Victory: Stories from a Presidential Election" (2011) on the 2010 elections.
She has written on media issues and authored the book, "News for Sale: The Corruption and Commercialization of the Philippine Media (2004)," published by the Philippine Center for Investigative Journalism. She obtained her graduate degree from Columbia University's School of Journalism in New York and is a lecturer at the undergraduate level of the Ateneo de Manila University. She has been the recipient of awards from the Jaime V Ongpin Awards for Excellence in Journalism.
Former director of the Asian Center for Journalism at the Ateneo, Chay also teaches News Writing and Investigative Journalism to undergraduate students. She is drawn to journalism because it allows her to write stories that have the potential to make a difference.